136 Bulletin 313 



Cercospora graxuliformis Ell. & Hohv. — On the leaves and peti- 

 ole of Viola cucullata. Causes more or less circular spots about 1 

 cm. in diameter with somewhat indefinite margins. Conidiophores 

 densely compact, brown, non-septate, nearly straight, becoming un- 

 dulate, 15-25 X 3 /x; conidia cylindrical, straight, brown, 1-6 septate, 

 17-85 X 2>4-3 /x. 



808. Infected violet leaf. 809. Conidiophores, 1/12. 810. Conidia, 1/12. 



Cercospora ilicis Ell. — On leaves of Ilex glabra. Causes small 

 brown spots, about 2-3 mm., with narrow slightly elevated margins. 

 Conidiophores on both surfaces of leaf, slightly branched, septate, 

 50-70 jx long; conidia guttulate, cylindrical, hyaline, 1-3 septate, 

 35-50 /A long. 



811. Infected leaf of Ilex glabra. 812. Conidiophores, 1/12. 813. Conidium, 

 1/12. 



Cercospora magnolivE E. & Hark. — On the leaves of Magnolia 

 glauca. Causes very small suborbicular spots visible on both sur- 

 faces of the leaf. Conidiophores on both surfaces fasciculate, hya- 

 line to dark brown, septate, 25-40 fi. Conidia obclavate, 3-5 septate, 

 20-40 fi long. 



814- Part of infected magnolia leaf. 815. Conidia, 1/12. 



